diff --git a/umap/static/umap/js/modules/global.js b/umap/static/umap/js/modules/global.js
index 62f3cbbc..90bd180f 100644
--- a/umap/static/umap/js/modules/global.js
+++ b/umap/static/umap/js/modules/global.js
@@ -1,12 +1,12 @@
 import URLs from './urls.js'
 import Browser from './browser.js'
 import * as Utils from './utils.js'
+import SCHEMA from './schema.js'
 import { Request, ServerRequest, RequestError, HTTPError, NOKError } from './request.js'
 
 // Import modules and export them to the global scope.
 // For the not yet module-compatible JS out there.
 
-// Copy the leaflet module, it's expected by leaflet plugins to be writeable.
 window.U = {
   URLs,
   Request,
@@ -16,4 +16,5 @@ window.U = {
   NOKError,
   Browser,
   Utils,
+  SCHEMA,
 }
diff --git a/umap/static/umap/js/modules/schema.js b/umap/static/umap/js/modules/schema.js
new file mode 100644
index 00000000..db3075ca
--- /dev/null
+++ b/umap/static/umap/js/modules/schema.js
@@ -0,0 +1,62 @@
+import { translate } from './i18n.js'
+
+const SCHEMA = {
+  zoom: { type: undefined },
+  scrollWheelZoom: { type: Boolean },
+  scaleControl: { type: Boolean },
+  moreControl: { type: Boolean },
+  miniMap: { type: Boolean },
+  displayPopupFooter: { type: undefined },
+  onLoadPanel: { type: String },
+  defaultView: { type: String },
+  name: { type: String, label: translate('name') },
+  description: { type: String },
+  licence: { type: undefined },
+  tilelayer: { type: undefined },
+  overlay: { type: undefined },
+  limitBounds: { type: undefined },
+  color: { type: String },
+  iconClass: { type: String },
+  iconUrl: { type: String },
+  smoothFactor: { type: undefined },
+  iconOpacity: { type: undefined },
+  opacity: { type: undefined },
+  weight: { type: undefined },
+  fill: { type: undefined },
+  fillColor: { type: undefined },
+  fillOpacity: { type: undefined },
+  dashArray: { type: undefined },
+  popupShape: { type: String },
+  popupTemplate: { type: String },
+  popupContentTemplate: { type: String },
+  zoomTo: { type: Number },
+  captionBar: { type: Boolean },
+  captionMenus: { type: Boolean },
+  slideshow: { type: undefined },
+  sortKey: { type: undefined },
+  labelKey: { type: String },
+  filterKey: { type: undefined },
+  facetKey: { type: undefined },
+  slugKey: { type: undefined },
+  showLabel: { type: 'NullableBoolean' },
+  labelDirection: { type: undefined },
+  labelInteractive: { type: undefined },
+  outlinkTarget: { type: undefined },
+  shortCredit: { type: undefined },
+  longCredit: { type: undefined },
+  permanentCredit: { type: undefined },
+  permanentCreditBackground: { type: undefined },
+  zoomControl: { type: 'NullableBoolean' },
+  datalayersControl: { type: 'NullableBoolean' },
+  searchControl: { type: 'NullableBoolean' },
+  locateControl: { type: 'NullableBoolean' },
+  fullscreenControl: { type: 'NullableBoolean' },
+  editinosmControl: { type: 'NullableBoolean' },
+  embedControl: { type: 'NullableBoolean' },
+  measureControl: { type: 'NullableBoolean' },
+  tilelayersControl: { type: 'NullableBoolean' },
+  starControl: { type: 'NullableBoolean' },
+  easing: { type: undefined },
+}
+
+export default { SCHEMA }
diff --git a/umap/static/umap/js/umap.forms.js b/umap/static/umap/js/umap.forms.js
index 2d28a026..7834b499 100644
--- a/umap/static/umap/js/umap.forms.js
+++ b/umap/static/umap/js/umap.forms.js
@@ -1276,6 +1276,9 @@ U.FormBuilder = L.FormBuilder.extend({
 
   initialize: function (obj, fields, options) {
     this.map = obj.map || obj.getMap()
+    for (const [key, schema] of Object.entries(U.SCHEMA)) {
+      this.defaultOptions[key] = this.defaultOptions[key] || schema
+    }
     L.FormBuilder.prototype.initialize.call(this, obj, fields, options)
     this.on('finish', this.finish)
   },
diff --git a/umap/static/umap/js/umap.js b/umap/static/umap/js/umap.js
index bc73784b..c503c418 100644
--- a/umap/static/umap/js/umap.js
+++ b/umap/static/umap/js/umap.js
@@ -57,64 +57,6 @@ L.Map.mergeOptions({
 
 U.Map = L.Map.extend({
   includes: [ControlsMixin],
-  editableOptions: {
-    zoom: undefined,
-    scrollWheelZoom: Boolean,
-    scaleControl: Boolean,
-    moreControl: Boolean,
-    miniMap: Boolean,
-    displayPopupFooter: undefined,
-    onLoadPanel: String,
-    defaultView: String,
-    name: String,
-    description: String,
-    licence: undefined,
-    tilelayer: undefined,
-    overlay: undefined,
-    limitBounds: undefined,
-    color: String,
-    iconClass: String,
-    iconUrl: String,
-    smoothFactor: undefined,
-    iconOpacity: undefined,
-    opacity: undefined,
-    weight: undefined,
-    fill: undefined,
-    fillColor: undefined,
-    fillOpacity: undefined,
-    dashArray: undefined,
-    popupShape: String,
-    popupTemplate: String,
-    popupContentTemplate: String,
-    zoomTo: Number,
-    captionBar: Boolean,
-    captionMenus: Boolean,
-    slideshow: undefined,
-    sortKey: undefined,
-    labelKey: String,
-    filterKey: undefined,
-    facetKey: undefined,
-    slugKey: undefined,
-    showLabel: 'NullableBoolean',
-    labelDirection: undefined,
-    labelInteractive: undefined,
-    outlinkTarget: undefined,
-    shortCredit: undefined,
-    longCredit: undefined,
-    permanentCredit: undefined,
-    permanentCreditBackground: undefined,
-    zoomControl: 'NullableBoolean',
-    datalayersControl: 'NullableBoolean',
-    searchControl: 'NullableBoolean',
-    locateControl: 'NullableBoolean',
-    fullscreenControl: 'NullableBoolean',
-    editinosmControl: 'NullableBoolean',
-    embedControl: 'NullableBoolean',
-    measureControl: 'NullableBoolean',
-    tilelayersControl: 'NullableBoolean',
-    starControl: 'NullableBoolean',
-    easing: undefined,
-  },
 
   initialize: function (el, geojson) {
     // Locale name (pt_PT, en_US…)
@@ -329,7 +271,7 @@ U.Map = L.Map.extend({
     // FIXME retrocompat
     L.Util.setBooleanFromQueryString(options, 'displayDataBrowserOnLoad')
     L.Util.setBooleanFromQueryString(options, 'displayCaptionOnLoad')
-    for (const [key, type] of Object.entries(this.editableOptions)) {
+    for (const [key, { type }] of Object.entries(U.SCHEMA)) {
       switch (type) {
         case Boolean:
           L.Util.setBooleanFromQueryString(options, key)
@@ -904,7 +846,7 @@ U.Map = L.Map.extend({
 
     let mustReindex = false
 
-    for (const option of Object.keys(this.editableOptions)) {
+    for (const option of Object.keys(U.SCHEMA)) {
       if (typeof importedData.properties[option] !== 'undefined') {
         this.options[option] = importedData.properties[option]
         if (option === 'sortKey') mustReindex = true
@@ -1033,7 +975,7 @@ U.Map = L.Map.extend({
 
   exportOptions: function () {
     const properties = {}
-    for (const option of Object.keys(this.editableOptions)) {
+    for (const option of Object.keys(U.SCHEMA)) {
       if (typeof this.options[option] !== 'undefined') {
         properties[option] = this.options[option]
       }